Self‐Assembled Carbon Dot Nanosphere: A Robust, Near‐Infrared Light‐Responsive, and Vein Injectable Photosensitizer

Self‐assembly “activated” carbon dot photosensitizer: a robust, NIR‐light responsive, and vein injectable carbon dot nanosphere (CDNS) photosensitizer with 1 O 2 quantum yield of 0.45 under 671 nm laser irradiation has been developed through self‐assembly using individual CD as building units. This study develops the biomedical applications of CD, highlights the self‐assembly for designing well‐defined CD‐based photosensitizers, and promotes future explorations of this CDNS photosensitizer in nanomedical and clinical applications.